Wednesday, February 25, 2015

You have a pterygium...now what?

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A pterygium is a growth of fibro-vascular tissue that develops on the conjunctiva, or white of the eye, and extends into the cornea, which is the clear covering over the colored part of the eye.  This type of tissue growth causes symptoms similar to dry eye, such as burning, redness, or a foreign body sensation.

Image of cornea

Over-the-counter lubricating eye drops or a short course of steroid eye drops commonly treat and manage these symptoms. However, if the tissue grows into a patient’s line of sight, surgical methods are needed to preserve vision.

Exposure to UV light causes many occurrences of pterygium, so wearing proper sun protection is key to preventing this tissue growth. Be sure to ask your eye care professional about polarized sunglasses, which block damaging UV rays. Foreign bodies also cause tissue growth, because the objects continuously rub across the surface of the eye. Make sure that you wear the proper safety glasses when exposure to foreign bodies is a risk.

From the eye doctors, opticians and staff at Rinkov Eyecare Centers. We’ve provided comprehensive eye exams, contact lenses, eyeglasses, sunglasses and medical treatment of eye disease, such as cataract treatment, in Columbus, Ohio for over 35 years. Come see an optometrist at one of our Columbus locations – Downtown, West, East, Westerville, Dublin, Bexley, Worthington and Nationwide Plaza.

Friday, February 20, 2015

Why is my contact lens prescription a different strength than my glasses prescription?

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Many contact wearers notice that the numbers on their contact lens prescription are different from the numbers on their glasses prescriptions. While some patients may think this is a mistake, there is a very simple explanation: distance.

The distance at which a corrective lens sits from the eye causes a notable difference in the strength of the prescription. This can easily be demonstrated by taking one’s glasses and extending them further away from the surface of the eye. If you have a nearsighted prescription, you will notice the power of the lens becomes weaker as you move it further away, and a farsighted prescription becomes stronger as you move it further away. Because of this, it is important that glasses prescriptions be tested at a similar distance to where a frame sits from a patient’s eye. During an eye exam, your doctor uses a phoropter to present multiple lens options at approximately 12 millimeters from the surface of the eyes.

When fitting contact lenses, the prescription must be adjusted, because contacts are placed directly on the eye, which is 12 millimeters closer than eyeglass lenses.  For nearsighted prescriptions, this means that the minus power of the contact will need to be weaker than in a glasses prescription. For farsighted prescriptions, it means the plus power of the contact will need to be stronger than in a glasses prescription. This difference varies depending on the strength of the prescription and only affects prescriptions over four diopters.

From the eye doctors, opticians and staff at Rinkov Eyecare Centers. We’ve provided comprehensive eye exams, contact lenses, eyeglasses, sunglasses and medical treatment of eye disease such as cataract treatment in Columbus, Ohio, for over 35 years. Come see an optometrist at one of our Columbus locations – Downtown, West, East, Westerville, Dublin, Bexley, Worthington and Nationwide Plaza.

Wednesday, February 11, 2015

Stereo Acuity and Summation: The Advantage of Two Eyes

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Frequently during eye exams, patients will notice they see better on the eye chart with two eyes open, and will try to sneak around the cover paddle to get to two eyes ASAP. We are well familiar with the mathematical rule, the whole is not greater than the sum of its parts, but eyes are an exception to this rule. Summation describes the brain’s ability to add the vision from each eye in order to produce better visual acuity than one eye provides alone. As a result, the exam chart may read something like this:

20/20 Right(OD), 20/20 Left(OS), 20/15 Both(OU)


Stereo acuity, or 3-D vision, is another binocular (when two eyes work together) visionprocess. Because the eyes are physically separated by space, they view object from a different angle, and the brain can then interpret depth. For example, those of you without stereo cannot appreciate 3-D puzzles and movies.

Eye conditions that can limit summation and stereo acuity include refractive error, amblyopia, monovision, esotropia, exotropia and a host of possible medical eye concerns.

We advise all minions, one and two-eyed, to have regular eye exams.

From the eye doctors, opticians and staff at Rinkov Eyecare Centers. We’ve provided comprehensive eye exams, contact lenses, eyeglasses, sunglasses and medical treatment of eye disease such as cataract treatment in Columbus, Ohio, for over 35 years. Come see an optometrist at one of our Columbus locations – Downtown, West, East, Westerville, Dublin, Bexley, Worthington and Nationwide Plaza.

Wednesday, February 4, 2015

Eye boogers!

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You know that stuff you wake up with in the corners of your eyes? Some might call it sleep, eye boogers, mattering, or just plain old crusty stuff. Whatever you call it, most of us have it in the morning, so what is it exactly?


This discharge, known as rheum, is nothing more than a combination of mucus, oil, dead skin cells and other debris such as makeup or dust that accumulates in the corners of the eyes and lash lines while you sleep. Normally we remove excess mucus, oil and debris after each blink, preventing them from accumulating. However, we aren't blinking while we sleep, which means that the debris forms the eye boogers we find in the morning.


Sometimes people mistake this crusty stuff as discharge from an infection. While a little mucus in the morning is normal, there may be something else going on if the consistency or amount changes. There are different types of discharge with different causes. Conditions like conjunctivitis (pink eye), blepharitis, sties and dry eye can all produce discharge along with other symptoms. You should schedule an appointment with your eye care professional if you experience any out-of-the-ordinary symptoms.


From the eye doctors, opticians and staff at Rinkov Eyecare Centers. We’ve provided comprehensive eye exams, contact lenses, eyeglasses, sunglasses and medical treatment of eye disease such as cataract treatment in Columbus, Ohio, for over 35 years. Come see an optometrist at one of our Columbus locations – Downtown, West, East, Westerville, Dublin, Bexley, Worthington and Nationwide Plaza.